/*
 * Copyright (c) 2012 Robert Burrell Donkin robertburrelldonkin.name
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 * and associated documentation files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software 
 * is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or 
 * substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 */
package walrus.text;

import java.util.ArrayList;
import java.util.List;

import walrus.base.CharProcessor;

public class SimpleWordParser implements CharProcessor {

	private StringBuilder builder;
	private final List<String> words = new ArrayList<String>(9128);
	
	public SimpleWordParser() {
	}
	
	public CharProcessor process(char next) {
		if (Chars.isWhitespace(next) || Chars.isPunctuation(next)) {
			if (builder != null) {
				word();
				builder = null;
			}
		} else {
			if (builder == null) {
				builder = new StringBuilder();
			}
			builder.append(next);
		}
		return this;
	}

	protected void word() {
		if (builder != null) {
			final String word = builder.toString().intern();
			words.add(word);
		}
	}
	
	public void eof() {
		word();
	}

	public List<String> getWords() {
		return words;
	}

	public void clear() {
		words.clear();
	}
}
